Polishing-wheel



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. W. S. BISHOP.

POLISHING WHEEL. No. 285,559. Patented Sept. 25, 1883.

INVBNTOR ATTORNEYS.

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UNITED STATES PATENT OFFICE..

WALTER S. BISHOP, OF NEV. HAVEN, CONNECTICUT.

PoLlsHlNG-WHEEL..

SPECIFICATION .forming partof Letters Patent No. 285,559, dated September 25, 1 883.

Application filed July 21, 1883.

in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation of my improvement, partly in section.` Fig. 2 is a sectional elevation of the same, taken through the line x Fig. l. Fig. 3 is a face view of the same. Fig. 4 is a section of a part of the inner leather band, showing the score to receive the stitches.

The object of this invention is tofprovide emery-wheels constructed in such a manner that they will not become changed in shape from dampness, and which will be strong and durable, and less liable to break than emerywheels constructed in the ordinary manner.

My improved wheel is made with a rim, A, and aweb, B, and is stamped or spun up from a single piece of sheet-iron. or other suitable metal. The web B inclines inward from one edge of the rim A nearly to the central plane of the wheel, and the part of the said web next the arbor-receiving aperture is at right angles with the axis of the wheel, as shown in Fig. 8, so that the bearing of the wheel will be at or nearly at the center of gravity of the wheel. Y

The wheel is designed to be secured to the arbor by nuts and washers in the ordinary manner.

The rim A is covered by a leather band, C, which is cemented to the said rim A, and is further secured in place by wires D, passed through holes in the rim A, near its edges, and through the said leather band. The ends of the leather band C are beveled and slightly overlapped, as indicated at the point E in Fig. l. The outer surface of the leather band C has an inclined score or groove, F, formed in it to receive the wire stitches, as shown in Figs. 1, 3, and 4, so that the said stitches will be beneath the surface of the leather, and when the projecting lip of the score is pressed down will leave the said surface smooth. Y

(No model.)

Upon the leather band C is placed asecond leather band, G, which is coated with emery in the ordinary manner. The band G is cemented to the band C, and its ends are beveled, overlapped slightly, and sewed to each other.

With this construction the shape ofthe wheel will not be changed by shrinking, swelling, and warping, as is liable to occur with wooden wheels.V Vith this construction, also, when the wheel is rapidly revolved, the tendency is to throw the free edge of the rim outward by centrifugal force. At the same time the pressure of the article being polished will force the part of the rim with which it is in contact inward, so that the elastic rim of the wheel will accommodate itself to the article being pol` ished, and thus give the article an even polish.

Having thus described 'my invention, I claim as new and desire to secure by Letters Patentl. An emery-wheel having a metallic rim, A, bent from one edge inwardly to form a bracing-web, B, and thus prevent a change of shape by shrinking or warping, as described.

2. The combination, with the outer emeryband, G, of an interior band, C, having the inclined scores F, and `wires D, arranged in said scores, as and for the purpose specified.

3. In an emery wheel, the combination, with the edge of the rim A, of a web, B, having the part next the rim A inclined `inward from the edge df the rim nearly to the central plane of the wheel, andthe part of the said web next the center opening at right angles with the axis of the wheel, substantially as herein shown and described.

4. In an emery wheel, the combination,

with .the perforated rim A and the scored leather band C, of the wire D, substantially as herein shown` and described, whereby the said leather band will be held securely in place, and will have a smooth outer surface to receive the outer or emery-coated band, as,

set forth.

VALTER S. BISHOP.

Vitnesses:

JOHN II. BUsHNnLL, SAMUEL BIsHor. 

